Molding press



May 6, "1930. I G. G. HEGHINIAN 1,757,119

' MQLDING PRESS Filed Aug. 28, 1926 2 Sheets-Sheet l r I l k 77-715/5 2573 May 6, 1930. G. Ylcs.. HEGHINIAN' MOLDING PRESS 2 Sheets-Sheet 2Filed Aug. 28, 1926 FIG. 7

95 F/cal 1o INVENTOR Patented lVllayr6,-1930 i f e l@Ammanne. nnenmmm orBA'Lfrnvro.1r-n, MARYLAND 'Y MOLDINerneuss-` Y.Aplinearity Yfueaaugust28, 192e.` serial No. 132,240. l

The main object is to provide a simple, feeding the chargesof materialtothel dies. powerful and reliable press for formingai` 1 IThe frame lofthe press consists of three ticles from moldable materiah' A mainfparts,a base 15, Which-contains part ofv Another object is to provide aconstruction the hydraulic equalizing mechanism,and inofv this characterfor 'molding alternately in termediatepart lfconstituting'a die body 55and table, and the upper part 17 Which carries L a number of molds.

Another object is to provide for the autothe, driving mechanism, crankshaft and matic control of the'mol'ding pressure 4so as plungers. toproduce uniform lresults and avoid'injury The die'bodyis providedWithtvvo molding o to the machine@ .j Y recesses 18 and 19. Theanvillmembers 2O 60 Another object is to insure perfect molding, and 21areadapted to move up and'doWn in particularly around the edges of thearticle. these; recesses and form the lower, die vfaces Y Another objectis to insure automatic ejec for-the blocks to be moldedh 'A rocker` memjy e tion of the articles.. ber has a shaft 22'resting in. bearing 23 Vin5 The particular machine' herein illustrated thefupper part of thel base15 This rcker 65 is designed for handling materialssuch as member hastWo side arms `24k 'andI 25' coninixtures of asphalt, saw-dust and clay,or nected by ycross barsQG and 27 which "are other mineral aggregate. Ymounted linslots 'in the lopposite ends,`V and The machineillustratedconstitutes one inwhich 31161063@ in Slots inthe bottomfof the i ,jgstrumentality in aprocess of forming blocks anvil members 21 and 2OYrespectivelyl Two 70 embodying neWand useful characteristics., pail-SOfpush rods 28 M129 aremo'unted on, For instance, a block formed ofasphalt, savvthe Vends ofy the lcross rods l26 andf27 and dust and clayuseful especially for road pav-V guided 'in lthe uppep part of ,the body16, 'S0 ingV purposes. Such an article 1S made thatv they can move upandfdovvn and trans-V mXDg' fSaW-dUSbWlth Clay .Mld wat?? andmitacorresponding'actiorthroughthe rocker then adding liquid asphaltand'mixrngrthe O'n thehaft 22 152'? V-v j K A materials at atemperaturelsulicient to evapo- The' l'plungers 30 and 31l mounted'abovethe. rate the water. 4The resultant substance 1s anvil mgmbei-S 20- and21,3@ adapdto'bg adapted to be molded under pressure and raised Aandloweredby the crankshaft/32 3.a V-llhOllt Of further'heat.'and'theconne'ctng 5J Figure V1 isaside view o'on'e formof pressad'altem'ately 4, y n embodyngmy'nVenfQn#l? i f-1Thedrivingroffthecrank'shaft'isfeffected "j Figur-@2lsa-I'OHWGVZO-thelmei f fromA the gear 35andshaft,.36,YvvhichcarriesFigure 3 isa longitudinal sectional View gear 3,7? meshing with gear 38.f" This-latter l of the machine. l,

- u f is on'the shaft 39,3Which car-r-iesgear'lQkme'sh- Figure 4 isatransverse sect1o1rofthema-V fing with-gaaf 41 'Ongi-ghe 'endbfpzfhgCrank chine. v f j Shaft 1*: 1,7 i.; i Y Figure tt'isiarsectionfofa'modication. Y Qn the* die -body's mouliteda-fs1d; Qrhavi y Figure 6 isa, 'Sdevw 0f.l an accumulator cross seetionalshapeandsizejasthepiangere13,0 l0@ Sed Wthtlle prrr/SS. y 30,and'll,jandlrecesses18Aand19,fandffanvils Figure 7 fs, fagmentay Vertlclse- 20 and 21'rspectve1y-fThis-slide s'r'ec'ptional view ofahopperand feeddevicef J rocatd on theldie body-ibyftv'vo arms-145, g Y Figure 8 is a `plan"view ofone formofall which are hinged to the center ofthelslide and 5 anvil orbottomg'die. Y Y l to aleve'r thingedat?. l'lhc'connection 35* Figure 9is an end view-of the same.; v 1 between the lever 46 and therods'lis'efected Figure lO'is a side view of the same.V v y by ,eyel bolts andnuts so-asto permitradjust- Figure rl1 is a longitudinal sectional view'ment ofthe length ofstrokeandsof the posi# Y* f i tionoftheslideonthediebody. 1

5e Figure 12is'av planfviewof the vslideV for I Oneformfofsu'chconstruction/'consists of l@ an eye bolt 48 on the end of the bar 45Vadjustable in position by the nuts 49 and 50 so as to Vmove the slide42 to the desired position for registration With the recess 18. The eyebolt 51 on the shank of eye bolt 48 is itself secured in a verticallyadjusted position with respecttolthe lever 46 bythe nuts 52 and 53.

The twvoeye bolts 48 and 51 are'connected by the coupling Sleeve 54. Thevertical adjustment of the eye bolts 51 changes the effective" length ofthe lever 746 iso ashto vary'ltliethrow of the slide 42 so asto bringthe opening '43 into registration With fthe recess 19. The

v lever 46 has a roller 55 atxits upperend Which v. extends into thegroove 'of cam 156 onthe end of .the crankshaft 32 so `that :as thecrank shaft rotatersrthelever y46-'oscillatesfarnd re v eiprocates 'theslide42i between the plungers and fanvils. ,y Y.

The material tol be {molded} is fed through al'hopper'orfchute? toil-apoint-immediately abovetheslideg42 andunidivay between theV krecesses 18and 19. To'facilitatetheeoperation', the chute' has 1a. horizontalportion 58 yat its lower end in which .ispmounted afserew threador;propeller 59. on the V-shaftll 4This shaft has afstepped .pulley 61beltedto-thev steppedpulley 62 on'ftheshaft 63 Which car-i riesthespiral; gear` 641which meshes Ewith an'- i otherspiral gear fonetheshaftA39. These stepped pulleys make itfpossiblef-tosvarythe rateoffrotationhoftheconveyorzserew 5,9 and hence vary the-amount ofmaterial fed to the slide- ,openings 43 L.and `t4-so.; as .to controltheV amountof-the materialfor the desired thick- Y nessofblocks v to:loe formed.v The depth of theabloclror thickness Jmay befregulatedputtinginlortaking out Yshim plates- 89;'above the pistons oit-rams.

.Itis thusZ possibleto nuakeblocks of- *diner-.I

' ent thicknesses with the same mechanisrmby` simply changingrthe speedof feed ofthe-ma-vr terial andfthe shimsgon `topi,ofthe Vpistons or:Theplun-gerssa-re provided-With projecting lugs 66 Whichextend outoverytherods128 and 29:` respectively-S01 that-uhehne-plulleer,

for instance, 531,. is depressedV it Will gat .Y the lower' endgof itsstrokeg-engagefthe rods 28,"

'f and-pushthem down'.thustiltingthe rocker about thegshaftf22.-andfforcingupward the anvil20 sofas to ejectthe` block fromgthe. Y*recess-18411; the path fof. movement. ofthe slide mechanism;inludinganaccumulator.' sailin-v 'F der 71,' and fplunger 72, andY asuspended vveigl1`t7 -3.I lIn the bottom; ofthe base 175,-a-re' twocylinders V7 4 and 75 .connectedby a-pipe 76at'o theaccumulatorecylinler. `slistons or rams 77 and 78 .in Ythesevcylinders-areapropistons are held in place locking plates 81 and 82..The Weight? 3 may be varied by adding or subtracting Weights. Liquidmay be pumped into `the accumulator through the Valve 83 and itspressure'may be indicated by a Gage 84. f

, ach. anvi1,'such as 211prefer-ablyhasa 'centralmemberS su held4dovvnby a cross piece 87 and pin 88. "In the operation'of the machine,if We assumethatthe!parts-arekinitially'in the posi y tion of F igure3,the molding composition is `feilthrough thecliute 57and forced by the.screw 5.9 into the opening 43 in the slide 42.

Thefcam'is so `ti1ne`d that the slide 42 is not-moved until theplungerSOhas been entirely Withdrawn from; thefopeningfll, WVhen the plunger isycleared, theislide fis .moved to bring the opening ..43and its;vchargeover the anvil21- and the prospective-recess 19. ;'Ihe

plunger 31 is then forced downwardathrough pported-onssprings. 86 andVthe opening A3 rand;` compresses uthe material inl. tlielr'ecess 19;fyIn A.this.- aetion .theganvilfl bottoms on'the-shimiplate -89 fontopnofthe piston or ram, 78. It will besseennthatzthe str-okefof thereciprocating. plnngers f3.0 zand 3l, iis'positivelydetermined by' the 3design? of 1 the for ankfsh-aft. andconsequentlyrthefamount ofcompression of the blockaisdeterminedby the ,pressure :in I.theaccumulator, that is, E of course, vassumingfthat there isla reasonablyfullfcharge fofniaterial in fthe. opening V43 to begin With. f

- In caseari-'excessive amount loff material` has n been 'fedfintotheadiefitsimply results'in the production :of Va fblockjo'f' slightly.l greater thiekness .and Withoutiinj-ury I:to )the .f-appafr-atus,since ithe .anvil and pistonl can .move downward yequivalent .to theexcessive 1 thlckness by.:forcingfthealiquidinthe cylinder back I intothe.aceuinulator.;-y'V n A 'Theiblocks l.are ej ect'ed :from the Vdife'.byf the positive factionr'if:r thee-flugs: ystriking fthe l l' l rods 28androckingthe'rfejfector ffrainevabout its shaft g22'so estoi-.lift the.anvil 20andpush the biook `from f the vrecess 1218,] out of`l thev dieinto the path* ofl movement of f'thexislide 42- perfect l aroundthefed-ges fsince ithe fkspr-ingsf Y 86|v hold -upth-e center offtheliewhile the. ma? terial is fed into the die,-thuskinsuri ng that moremateria-lifall a'llaa-round'fthe: die'y than-'at `the center. Y f I Thestrength: the. 8672,. hovveve'rj` is merely sufficient to'hold up thecentralaporf tienen-1mb@ feeding-fer the; die ena ehe initialpressuretake place," after'which thev 16 onoppo'site edges ofthe recess19 Vwhen.

theV anvil "is in the position shown at the right in VFigure 3, so thattheV center piecev is flush with the face of thefanvil.

In the modification shown inFigure 4& he plunger consists of two partsnamely, the die part 90 supported on springs 91and the ram 92 to whichthe *connecting rod 93 is lconnected. This form has certain advantagesover the firstvform but the first form of Figure 4 is more positive'inits withdrawal action.

The slide 42 may have separable ends 42kv connected by yieldable catches42a as shown in Figure l2fso that in case'the plungers stick in the die,the slide canseparate or pull apart and thus prevent breakage. n

One of the compositions or materials suitable formolding consists Voffrom to 50 parts by weight of saw-dust, from to 40 parts of asphalt, andabout 10 yto 20parts of clay. The clay is mixed with water so as tosoften'all lumpsand nearly as possible form a colloidal solution. Thisis then'added to `Vthe saw-dust in a d'ouble'walled Vmixerpand heated toabout 200 F. whilemixing, the sawdust absorbsthe water and clay. liquidasphalt is then addedv andthe mix- 0' continued Vunder artempera'ture of300 to 5020@ F;l for about 20 to"30 minutes or until.

the water is entirely evaporatech'leaving 'they A wood impregnated andcoated 4with clay and theasphaltic substance. The material, whenVproperly mixed,"resembles the consistencyofk wet sand and is veryeasilyhandled and molded; Although saw-dust Ai `s'preferred, some small 'woodchips or particles may be us d.V 'Ihepressure ofmolding. is preferably I.from one Vvto two tonsperi-square inchLw-Although I preferY to.use,fclay Vit should be 'il lunderstood that other nely dividedmi'neralsubstances may be usedwithor in place Vof the clay fory some purposes.`Y

In fact, roadside material including clay,

V'dirt and fine* sand, etc., can be mixed with vwater and asphalt andthen the kwater evapo t f 'as ialt im reenatec e lated S0 as o 011m P po i .theupper moldingsurfaceof the other part ls ok as tonprovideroomforagreater depth of mol'dablematerial aroundfthe 'edge than over durableroad pavingv material.

The process of. preserving vwoodmay also Y be applied to wood bloc-ksV'without vacuum or pressuresowas to impregnate them with clay andkwater phalt or creosote untilmthewater ls'evapof;`

and then immersein hot as rated. Y 1

It shouldbe understood also that the press maybe used kfor moldingasphaltic Ymaterial f v having a lrecess,"a "lower molding plungerrelatively movable 1n said recess from below containing crushed stone.

Y I claim:

having a recess, a lower molding plunger v relatively movable insaidrecess and formed 'common level. j v

offat least two parts one of which has an upper molding` surface whichis normally y below the upper moldingsurfaceof the other partso'as-tofprovide room for a "greater depthV of moldable""material overone partl than over Vthe other 'Y part, an upper y plunger movableintosaid recess from above and? `spring means between the two vpartsofthe lowerplunger for allowing the molding'surfaces of the two' partsof the lower'plunger tomove relative fto each other. i

` 21A molding press comprising adie bed` I havingtwo molding recesses,an anvil and a 1 plunger toco-act in each recess, a rocker connectingthe two anvils', a feedlng slide having two passages, movable betweensaid plungers and lanvils, means for -feeding the moldable having twomolding recesses, anvils movable in lsaid recesses, a rocker connectinglsaiol anvils, plungers to co-actwith the anvils, a crank shaft Aforoperating saidplungers, i

means for feeding material alternately to said-'recesses andmeansforoperating said rocker to alternately move said anvils to eject thefinishedarticle.

4. Ina molding press,adi`e member having two molding recesses, an anviland a plunger movable 1n each recess, a slide movable on said dielmember between said plungers and anvils and having passages fortheplungers, n

a rocker connecting the two anvils for-.feeding material yalternately-tosaid passages and means whereby when onefplunger is acting to formabloclrin its respective dielit moves the anvil coacting theyother-plunger" and-vice versa.V`

' 5. gmoldingpresscomprisingftwo mold-r ing units, means for-operatingtheml alter natev yf and hydraulic control and equalizingmea-nscoeafcting-fwithsaidfunits. i

` 6I In# a molding press,"` a idle:

parts one of which hasanupper--molding sur-Y face whichsurrounds andisnormally'below the-centralpart,V :anupperiplunger movable intosaidirecess fromabovef'and means for allowingthe molding surfaces of?the two'l parts/:ofthe lovverplunger to approach a t 7.y Aimolding4press comprising a die bed and formed of two parts one ofVwhich'surrounds the other and has anupper molding surface which; isnormally )below the 'upper bed havingv a recess, a'llower moldingplunger movablev -infsaidre'cessand formedof at; least twof f Ymoldngfsur'ace of\ thefotherfpart, an {upper compressing plungerrelativelyfmovable yintosaidwreoess from,T` above; and -f sprngfmeans[for allowing fthelgmolding [surfaces :offtlle two parts of f the -loWer:plunger f to -movegrelfatve toqeacb' other: as theupperandlower plungers ycompress f the Vmaterial fn-the recess.

,18. `Amolding-press eemprsing-afdiebed havrng a: reoess open;atzthegtooa lowermoldmg plunge-r movableun sald recess land formed ofat'least twofpartsone of1which hasfanaupper vmolding suracewhich's nor-Y lnally belowfthe upper Vmolding surface of tbe otherfpartso :as toprovide room for za s greater deptbfof moldable'materal over` one partthan love-r; thefother; pargfanl upper oom-r pressing plunger Vmovablekinto said recess from the @top and means for allowing ,the moldingsurfaeesofitheftwo partsfof the lower ,plunger to .'approaoh -a common`level as fthe-.upper and f lower .plungers compress` the materlalln therecess.,

' 9, Inafmoldingfpressrthe @Olorlbnationrof a z dre :bed Shavlng arecess open @above f and below, x upper and :lower plungers relatl-Velyv movable. into sadreeess -romaboveandfrom below-said de-,becbtbeflowerfplunger-having two'relatvely movable parts y,one-oli' wh-ebl surrounds,-they other and ,at certainstmes has its nppermoldngsunfaeeheld'ata leveldif- Y i ferent from the levelofstbennerpart and means.orgmovngtbettwoparts offtbelower plunger relative to .each other.

,10. lnamoldng press,aa.die bedeh-avng I.: two passages,Vplungersfmounted.above and below `feaeh passage, -means for alternatelyi raising ,andrlowerng tbe upper plungersandt'beflow'erplungers,eornprrsing a rockerfarm between .tlretwo tlowerplungers andmeans foralternately ieedmg nrateralsto "tbeftwo ll. In amoldlng press, a dle Vbedy.baN1I`1gg; two-passages, plungers :mounted'above and below each. passage, .meansforsalternately uaisngaandvloweringthe,upper,plungerslond n 'Y the lower plungersincluding-aroolgeraarm connecting*the. 4lowerplu-nge'rs-,and means'for plternatelyfeeding..materialtothe twopas-A a v sages, :and 'asingle-,enankfshat .withfmeans ofg connections tofthe upperfplungers for'-altternatelyfoperatingthesanne.A Y l. :12. A moldingl pressmeomprsing'adebed emma" 1 Y alternately byfthe 'rockerfarm-sanddepressedaltematelyabyfthe uppenpluugersn 14. A molding pnessieornprsing afdeqbedhaving :sa message; plungers vnl@uu-tedabove Y andbeloW-rsai'flfpassa-ges)hydraulic-,pressure means4 for,eushonillg fthe x[lowerliplungenga Cie-:uli Sbaftfforgeperatilg ililzuppr. Plvlself a feedslide hailing-afpassagge-foritbe 4 upper plunger :and means :for feedingnmaterial tto eheJ passagerinltheffeedwsldewhenfitiS eutfxf` registry,and means, :for :moving feeid'eed.

slide andi-ts; Contained tma beviel tOiwPOStQn of regietrylwith @therepassage iin 2th@ die Abed wbenibe upper plunger sraisedandtbe 10W- errluegerfisdepressed. o 15. A molding press comprising a. diexrlpedVASage, havinga passage/for imei-ferial, 11eme-ans for ,feeding material;to the (passage line'said eed slide,-trneans zfor-,uafrying tllleamount-.of material fedrto `the feed-slide, aplunger mov-l able `from,-beneath sad die. bed; into 5folle ,passage therein, :hydraulic grressuaemeans .ier Cusbon'ngvsaid plunger, aplunger movable from above said diebed zthnoughrtbe passage in tbe veed-slide and into-:the .passagen the16V. `(In aimolding pressade-bedlbaving ,a reeess, a lower mold-ingplunger .1 movable ,in said recess :and -orlned of at,leastdzwog partsone of .whi'ebhas an. upper molding surtaoe wbe'h; surrounds ,and :isnornrnallyY below the upper Ymolding surffaceiofrtheotber, part sofas toprovderoorn fonagreaterdepth ofvgnoldable materalaroundthe .edgeslthanover the oentralgpar't, anupper abutrnent abovesad Vle..CeSSandVJJQQELHS i for llflflevn'gthe melding surfacesiofthe two parts'of thelower. plunger` to; .bring-them Vto a cornmonlevelto compress' thematerial in4 the recess. agalnst the llower surface ofsaid abutment, the-,edgesf of the u material-1beinseempressflmfethantheenI Y ter. Y

having i two I die vvpassa-ges, `plungers 4r'nevalzle above andbelowfQ-eaehfde passagega ffeed Y e ,slldehaving'passa'gesfadapted' to'alternately register Awith `:ft-he L die passages and .a .screw feeddewiceylooated'betweenxthe upperfplungf passages in said slide.V

two :passa-ges, ipl'ungers mounted faboveliand ers lfor zfeedngmaterialu alternately .tothe Y below.7 said. passages, laf-rocker, armsoonnetngY they slower L'p'lun'gers and hydraulic 'pressure nrneansvfoneushoningztlezlower?plungersaalternately, s sard f lowerYeplungers belng .-ralsed Y

